Spring-wheel.



G'. B. DUNHAM. SPRING WHEEL.

APPLIOATION FILED MAE. 4. 1911.

Patented Dec. lz 1911.

YTo

UNITED STATESv PATENT OFFICE.-

CARL E; DUNHAM, F 'MADDOCIL NUBIB DAKOTA.

SPRING-WHEEL.

speememon e: Letten Patent Patented Dec. 12, 149111.

lippnuon inea umn 4, 19,11. serial nu. sienes.

Be it known that I, Cam. E. DUNAM, a

` citizen of the -United States, residin at Maddoch,I in the county of Benson and tate of North Dakota, have invented certain new and useful Improvements Spring-Wheels,

of which the following 1s a speciication,

reference being had to the accompanying drawings.

This invention is anbimprmfd lSpring .wheel for automobiles and other vehicles,

and consists inthe construction, combination and arrangement of devices, hereinafter de-` scribed Vand claimed. Y v

The object of my invention is to provide .an roved wheel in which the hub is thereby caus' movab e eccentrically land in' which the main 1o .of the wheel is connected to the hub eans of springs which serve to cushion centric with .its hub, and yet permit the wheel to yield and rebound when the same encounters inequalities in the road surface, the vehicle to ride smoothly' and heasily wi out jolts and jars, and also enabling the use of pneumatic .tires to be dispensed with.

l In the accompanying dra which Figure 1 is partl an elevation and pa viewo a spring wheel constructed in accordance' with' my invention. Fig."2 is a transverse sectional view of the same on the lane indicated by the line a-a of Fig. 1. 3 is a'. detail elevation of one of the e1: tensible spring cushioned' connections between the inner hub element and the outer vhub element.4

In accordance with my vide an' inner hub member hachv shown as having the usual bore 2, for the reception of an axle spindle. The said h ub element is provided wth a eri heral annular groove 3 and is provid at'its ends with cDoncksntrically disposed cylindrical bosses 4.

invention, `I roi 1 w 1s ere 5 the lbosses extend. The said dis bear against the ends of the hubmember 1,

y a sectional i have central openings throu h' Y Extensible 8 com rise each a bar member 9, and a U-shape member 10. To the outer end of eachbar member is secured a guidedisk 11, by means of nuts 12, the said bar member extending through .a centralopening `in the disk, and the'nuts being on opposite sides of the latter. Y The arms of the U-sha d member 10, extend through and are gui ed in openings in the disk 11, and are provided at their ends with a disk 13, the said disk being securedby nuts 14, and having a central olpenin in which the bar member 9 1s free to s 1de. he inner end of .3, 'ofthe hub member 1, and is pivotally mounted on a bolt or in 15 which extends lengthwise through t e said hub member.

lis 4connected to the band 7 w ich forms the outer hub member as by means of a suitable eye'bolt 16. On each extensible link. is a air of co-acting springs 17 18, which are ere shown as coil s rings he inner spring beaging between t edisks 11, and 18, and d the 4outer spring 18 bearing between the isk 11 and the outer hub `member or ring band 7, some of the extensible links beine disposed radially and others `being dispos ta entially in the annular space between the ub members 1 and 7. It will be under stood that the. coacting" springs while enas to aord eccentric movements tothe outer hub member or rin 7 coact with the .links vto connect the outer hub member, and to cushion the same.

Thewheel has in addition to the outer rim or felly 19 and the spokes 2G, an inner rim 21 in whic 4the ring or band 7'constitutin the outer hub element is fitted. A pair o covering disks 22, 23 are secured respectively `on the outer and inner sides of the s ring hub by means of bolts or other suitab e devices 24, which engage the inner rim 21 of the wheel. The inner covering disk 23 has a central opening 25 of suitable size to clear the axle and ermit of eccentric movement of the inner ub member' with respect to the outer ortion of the wheel. The outer covering isk 22 is here shown as rovided at 'its center with an ornament 26 w ich erorms no function. A suitable tire 2 is placed on the wheel rim 19, and in practice may be a solid rubber tire, or any other each bar member 9 is disposed in the groove' The outer end of each U-sha ed member 10V abling the links to lengthen and shorten soA ub member to the inner sitableform of tire maj be emplojed for.

tion. n

In Va spring wheel,"the combination of an outer member comprising a fell a'tire, an inner nim and spokes, an inner ub member having disks 4on its ends, covering disks secured to the inner and outer sides of the inner rim and bearing against the ends of the inner hub member and on the outer sides of the first named disks, the said inner hub member being movableeccentrical'ly between said coverin disks,4 and links connecting the inner hu member and the inner rim, each link comprisin a pair of vslidably re this purpose within'the scope of my mven lated members enab ling them to be lengthv`ened and shortened and co-actmg spinn s ons the'said links, the inner ends of said inks bein pivotally'connected'to the inner hub mem er, the said links beingdisposed ingrou s, each group comprising a radial mem er and a 4pair of tan entially disposed members on opposite si es of the radial member,. the inner ends of the members of each group having a. common pivot connecting them to the inner member. l

In testimony 'whereof I hereunto aiix my signature in the presence of two witnesses.

Witnesses:

D. G. DUNHAM,

Uo'ples of this'patent may be obtained for ve cents each, by addressing the "Commissioner of Patents, Washington, D. C. 

